[villagetinker]

OP, check to see if you exceeded your "allowed" download limit, if so Comcast may be throttling your speed. You can get the amount of data you downloaded by signing into your account. Also, as stated above, you can check you connection speed, I like Speedtest by Ookla - The Global Broadband Speed Test for this test, use a hardwired connection to your computer for an accurate test, THEN do the test again using your WIRELESS connection ( I am assuming the TV is wireless). The wireless will be lower than the hardwired. If it is significantly below 30 meg try rebooting your modem and see if that fixes the problem. If not, go online with comcast, choose CHAT, and tery to have them fix remotely.
Hope this helps.